package com.example.demo.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

import java.lang.reflect.Method;

/**
 * 缓存配置类
 * Created by rex on 2017/7/5.
 */
@Configuration
@EnableCaching // 启用缓存特性
public class RedisConfig extends CachingConfigurerSupport {
    // 缓存数据时Key的生成器，可以依据业务和技术场景自行定制
//    @Bean
//     public KeyGenerator customizedKeyGenerator() {
//       return new KeyGenerator() {
//         @Override
//         public Object generate(Object target, Method method, Object... params) {
//           StringBuilder sb = new StringBuilder();
//           sb.append(target.getClass().getName());
//           sb.append(method.getName());
//           for (Object obj : params) {
//             sb.append(obj.toString());
//           }
//           return sb.toString();
//         }
//       };
//
//     }

    // 定制缓存管理器的属性，默认提供的CacheManager对象可能不能满足需要
    // 因此建议依赖业务和技术上的需求，自行做一些扩展和定制
    @Bean
    public CacheManager cacheManager(@SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {
        RedisCacheManager redisCacheManager = new RedisCacheManager(redisTemplate);
        //设置过期时间
        redisCacheManager.setDefaultExpiration(86400);
        return redisCacheManager;
    }

    @Bean
    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
        StringRedisTemplate template = new StringRedisTemplate(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }
}